BL8573CB6TR

BL8573 500mA/1.5A Standalone Linear Li-Ion Battery Charge DESCRIPTION FEATURES The BL8573 is a single cell, fully integrated constant current (CC)/constant voltage (CV) Li-ion battery charger. Its compact package with minimum external components requirement makes the BL8573 ideal for portable applications.    No external sense resistor or blocking diode is necessary for the BL8573. Build-in thermal feedback mechanism regulates the charge current to control the die temperature during high power operation or at elevated ambient temperature.   Standalone Capability with no Requirement of External MOSFET, Sense Resistor or Blocking Diode. Complete Linear Charger in Compact Package for Single Cell Lithium-Ion Batteries Programmable Pre-charge, Fast Charge and Termination Current. Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating Charges Single Cell Li-Ion Batteries Directly from USB Port Preset 4.2V/4.35V Charge Voltage with 1% Accuracy Automatic Recharge Charge Status Output Pin C/10 Charge Termination 25A Supply Current in Shutdown 2.9V Trickle Charge Threshold Soft-Start Limits Inrush Current Available in SOT-23-6 and ESOP8 Package The BL8573 has a pre-charge function for trickle charging deeply discharged batteries. The fast charge current can be programmed by an external resistor. CV regulation mode is automatically enabled once the battery’s charging curve reaches the constant voltage portion. The output current then decays and is finally terminated once the charge current drops to 1/10th of the programmed value. The BL8573 keeps monitoring the battery voltage and enables a new charge cycle once the voltage drops by 150mV below the CV value.  Power supply state is constantly monitored and the battery drain current is reduced to minimum value automatically when the BL8573 senses a lack of input power. In its shutdown mode, the BL8573 can reduce the supply current to less than 25μA. A status pin outputs a logic HIGH/LOW to indicate the charging status and the presence of power supply. APPLICATIONS           Other features include charge current monitor, under-voltage lockout. TYPICAL APPLICATION BL8573 www.belling.com.cn 1 Cellular Telephones, PDAs, MP3 Players Charging Docks and Cradles Bluetooths Applications BL8573 ORDERING INFORMATION BL8573 □ 1□ 2□ 3□ 4 Code 1 2 3 4 PIN CONFIGURATION Product Classification Description BL8573CB6TR PROG STDBY VCC Marking Temperature&Rohs: C:-40~85C ,Pb Free Rohs Std. Package type: B6:SOT-23-6 S8: ESOP-8 Packing type: TR:Tape&Reel (Standard) Output voltage: 435=4,35V Blank(default)=4.2V 6 5 4 B1YW B1:Product Code B1YW 1 2 CHRG GND YW:Data Code 3 BAT SOT23-6 Product Classification BL8573CB6TR435 PROG STDBY VCC Marking 6 5 4 B1YW B1:Product Code B1YW 1 2 CHRG GND YW:Data Code 3 BAT SOT23-6 Product Classification LL: Lot No. ESOP-8 NC PROG GND YW: Date code VCC NC B1 LLHYW LLHYW H: Fab code BL8573CS8TR CHRG STDBY BAT Note：Y: The Year of manufacturing,”1” stands for year 2011,”2” stands for year 2012,and “8” stands for year 2018. W: The week of manufacturing. ”A” stands for week 1,”Z” stands for week 26,” A ” stands for week 27,” Z ” stands for week 52. ABSOLUTE MAXIMUM RATING VCC PROG BAT STDBY BAT Short-Circuit Duration PROG Pin Current Maximum Junction Temperature Operating Ambient Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 sec) –0.3V to 6.5V – 0.3V to VCC + 0.3V –0.3V to 5V –0.3V to 6.5V –0.3V to 6.5V Continuous 2mA 125°C –40°C to 85°C –40°C to 125°C 260°C Note: Exceed these limits to damage to the device. Exposure to absolute maximum rating conditions may affect device reliability. www.belling.com.cn 2 BL8573 BLOCK DIGRAM PIN DESCRIPTION STDBY: Open-Drain Charge Status Output. The STDBY pin outputs low when the battery is full. PROG: Program, Monitor the charge current and Shutdown. This pin set to 1V in constant-current mode. The charge current is programmed by connecting a 1% resistor, RPROG, to GND pin. The charge current can be calculated using the following formula: GND: Ground. I BAT  (VPROG / RPROG ) 1000 BAT: Charge Current Output. This pin provides charge current to the battery and regulates the final float voltage to 4.2V/4.35V which is set by an internal precision resistor divider. The PROG pin can also be used to switch the charger to shutdown mode by disconnecting the program resistor from ground. This results in a 3μA current to pull the PROG pin to a high level shutdown threshold voltage, thus stop the charging and reduce the supply current to 25μA. This pin is also clamped to approximately 2.4V. A higher voltage beyond this value will draw currents as high as 1.5mA. Device normal operation can be resumed by reconnecting the RPROG resistor to ground. : Open-Drain Charge Status Output. The pin outputs low when the battery is charging. VCC: Positive Input Supply. Needs to be bypassed with at least a 1μF capacitor. When input voltage drops to within 30mV of the BAT pin voltage, the BL8573 switches to shutdown mode. www.belling.com.cn 3 BL8573 ELECTRICAL CHARACTERISTICS VCC=5V, Ta=25°C, RPROG=10K, unless otherwise noted. SYMBOL VCC ICC VFLOAT IBAT ITRIKL VTRIKL VTRHYS VUV VUVHYS PARAMETER CONDITIONS Input Supply Voltage Input Supply Current Regulated Output (Float) Voltage BAT Pin Current 4.25 Charge Mode (Note 2) Standby Mode (Charge Terminated) Shutdown Mode (RPROG Not Connected, VCC